The effect of ionic strength and hardness of trichloroethylene-contaminated synthetic groundwater on remediation using granular activated carbon

Autor: Joonghyeok Heo, Ho-Wan Chang, Dong-Chan Koh, Dal-Heui Lee
Rok vydání: 2007
Předmět:
Zdroj: Geosciences Journal. 11:229-239
ISSN: 1598-7477
1226-4806
Popis: The objective of this study is to evaluate the effect of ionic strength and hardness of trichloroethylene (TCE)-contaminated synthetic groundwater on remediation using granular activated carbon (GAC). The TCE sorption rate onto GAC in synthetic groundwater was observed by batch experiments and ranged from 86.2% to 100%. As the ionic strength and hardness of the synthetic groundwater increased, the TCE sorption rates decreased. The sorption kinetics of the GAC were also analyzed by kinetic models. The Elovich model was more successfully applicable to the sorption kinetics than the Pseudo-first-order model. During the sorption, a greater amount of cations in groundwater were adsorbed than anions. The sorption capacity of GAC was affected by cations in groundwater. The GAC surface area was 958.98 m2/g and the calculated TCE and ions sorption areas were 318.38 m2/g, which comprised 33.2% of the GAC surface area. Our experiments showed that TCE remediation was influenced by the ionic strength and hardness of groundwater. The results of these experiments were confirmed by two different models and sorption areas. Therefore, the ionic strength and hardness of groundwater must be considered in the remediation of TCE-contaminated groundwater using GAC.
Databáze: OpenAIRE
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